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Author Topic: G.Fast timetable / crystal ball  (Read 8696 times)

niemand

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Re: G.Fast timetable / crystal ball
« Reply #30 on: August 31, 2016, 12:06:13 AM »

As I understand it they don't require them being turned off but they will be degraded due to the high power VDSL 2 signals sharing the spectrum with them. Previously VDSL 2 had power masking in the ADSL2+ frequency range however with this technology it doesn't.

This is trial time, though, and we know how obsessed Ofcom are by LLU even if it's holding progress back.
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j0hn

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Re: G.Fast timetable / crystal ball
« Reply #31 on: August 31, 2016, 08:46:55 AM »

As I understand it they don't require them being turned off
STIN 522 specifically states it does for the trial. The quote above actually stats with

[6], special dispensation  has  been received from  Ofcom to enable  LR-VDSL  trials to be deployed at specific locations
In order to prevent  exchange  based ADSL  or ADSL2plus customers served via a  cabinet selected for  LR-VDSL  being  adversely  affected, these lines must be migrated to  an FTTC GEA  service  (either VDSL  or  LR-VDSL, depending on D-side  insertion loss measured  at 300kHz).   This means that  LR-VDSL  can be  safely deployed without  adversely  impacting  exchange  based services.


This is specifically because like you just said the usual CAL shaping and PSD masking isn't applied.
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Talktalk FTTP 550/75 - Speedtest - BQM

niemand

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Re: G.Fast timetable / crystal ball
« Reply #32 on: August 31, 2016, 10:14:35 AM »

Thanks for the correction.
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Chrysalis

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Re: G.Fast timetable / crystal ball
« Reply #33 on: August 31, 2016, 12:19:18 PM »

I expect those areas have no LLU operators tho.

In area's where LLU operators exist there will be competition issues blocking it.
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Weaver

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Re: G.Fast timetable / crystal ball
« Reply #34 on: August 31, 2016, 12:21:12 PM »

Thank god there is no LLU up here then. Agreed, I can't imagine there is an LLU in Lewis unless Stornoway itself is an exception.
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Chrysalis

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Re: G.Fast timetable / crystal ball
« Reply #35 on: August 31, 2016, 12:22:30 PM »

If this LR-VDSL thing takes off, those areas which have no LLU may actually jump ahead of LLU areas.
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Weaver

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Re: G.Fast timetable / crystal ball
« Reply #36 on: August 31, 2016, 12:33:59 PM »

in which case Ofcom really needs a good kick up the arse. Ridiculous to be holding progress back because of outdated bureaucratic nonsense. Getting rid of ADSL should be a general goal unless there's a technical reason or practical reason why not, or where it might stuff some users.
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Bowdon

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Re: G.Fast timetable / crystal ball
« Reply #37 on: August 31, 2016, 12:52:12 PM »

I wonder how many exchanges have LLU operators these days. Most of the operators seem to have merged in to one by buying each other out.

On my exchange there is only Sky, TalkTalk, Zen and Vodafone (which was just enabled in June).

So 3 out of 4 have fibre products. I'm not sure about vodafone if they have fibre products or not.
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WWWombat

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Re: G.Fast timetable / crystal ball
« Reply #38 on: August 31, 2016, 01:59:23 PM »

I wonder how many exchanges have LLU operators these days.

Market A - with only one or two principle operators - is around 9% of premises in the UK. I guess the number with access to only BT is less than this.

However, I think Market A amounts to more than 3,200 exchanges (out of 5,600).
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Weaver

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Re: G.Fast timetable / crystal ball
« Reply #39 on: August 31, 2016, 02:18:06 PM »

BT was allowed to do FTTC and so make some real progress without the bureaucrats and meddlers trying to force the availability of some kind of sub-unbundled-FTTC or whatever onto us - is that correct?
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WWWombat

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Re: G.Fast timetable / crystal ball
« Reply #40 on: August 31, 2016, 07:04:57 PM »

I'm not quite sure what "sub-unbundled-FTTC" you might mean, but...

a) BT were forced to offer VULA on their fibre products, before FTTC was allowed. That's the virtual bitstream GEA service that Openreach sells to Sky etc.

b) And separately, BT have to offer physical SLU (LLU subloop unbundling) too - allowing other companies to install their own FTTC-style cabinet. Warwicknet do this, as do Callflow.
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Weaver

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Re: G.Fast timetable / crystal ball
« Reply #41 on: August 31, 2016, 07:11:34 PM »

Thanks WWombat, I'm not at all au fait with developments related to FTTC, a world forever denied to me at the moment.
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